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ESPECIALIZAÇÃO WIRELESS LAN COM UBIQUITI


Carga Horária
: 16 horas de treinamento

Horário: 08h às 18h

Data:  Breve nova turma – Clique aqui e preencha o formulário para registro de sua intenção em participar da próxima turma.

Pré-requisitos: Noções de redes de computadores

Público Alvo: Provedores de Internet, instaladores, projetistas e administradores de redes que pretendem implantar, ou que já possuem sistemas Wireless LANs em suas redes.

Objetivo: A indústria de Wireless LAN tem crescido de forma fenomenal.  Este curso tem o foco na tecnologia e nas tarefas vitais para instalação, gerenciamento e suporte a redes Wireless. Você irá aprender sobre os padrões tecnológicos, hardware, parâmetros e comportamento da radio frequência (RF), determinação de enlaces, cálculo de torres para liberação de linhas de visada, segurança de redes sem fio, soluções de problemas e metodologias de site survey. Aprenda com práticas mão-na-massa utilizando equipamentos de última geração.


Conteúdo programático:


Capítulo 1 – Padrões Wireless LAN

  • Definição da tecnologia Wireless
  • Padrões Wireless Globais
  • Padrões Wireless LAN – Comparação
  • Dilema: 2,4GHz ou 5,8GHz

 

Capítulo 2 – Fundamentos da Radiofreqüência

  • Radiofrequência – Definição
  • Anatomia da Forma de Onda
  • Comprimento de Onda
  • Espectro eletromagnético
  • Banda ISM
  • Radiofrequência – Parâmetros
    • Relação sinal/ruído
    • Ganho
    • Atenuação
    • Efeitos de obstáculos
    • Reflexão
    • Variação da fase na reflexão
    • Distorção por percursos múltiplos (multpath)
  • Radiofrequência – Comportamento
    • Espalhamento
    • Refração
    • Difração
    • Absorção
  • Matemática da Radiofrequência
    • Potência
    • Logaritmo
    • Decibel
    • Ganho e Perda
    • Fórmulas para db/db/P mw
    • Referência db – mw
  • Irradiador isotrópico
  • Potência Isotrópica Irradiada Efetiva (eirp)
  • Exemplo de cálculo

 

Capítulo 3 – Tecnologia Spread Spectrum, OFDM e Spatial Multiplexing

  • Licenciamentos para aplicações ponto-a-multiponto em 2,4 GHz
  • Limites de potência em aplicações ponto-a-multiponto em 2,4 e 5,8 GHz
  • Limites de potência em aplicações ponto-a-ponto em 2,4 e 5 GHz
  • Limites de potência em aplicações na faixa de 5,0 GHz
  • Considerações quanto a estações de radiocomunicação
  • Considerações quanto à necessidade de licenciamento de estação
  • Tecnologia de RF para Wireless LAN
  • Direct Sequence Spread Spectrum (DSSS)
  • Alocação de canais em DSSS
  • Canais que não se sobrepõem em DSSS
  • Co-localização de acess points
  • Orthogonal Frequency Division Multiplexing (OFDM)
  • Características OFDM
  • Canalização para OFDM em 802.11a
  • Alteração de largura de canais
  • Vantagens do OFDM
  • Taxa de dados sinalizada x Troughput em Mbps
  • O padrão 802.11n – MIMO
  • Obtendo maiores taxas de transmissão
  • Reflexões de sinais MIMO
  • Spatial Multiplexing – MIMO

 

Capítulo 4 – Componentes da rede wireless LAN

  • Componentes da rede wireless LAN
  • Operação do access point
    • Modo Infraestrutura ou Access point
    • Modo Bridge ou WDS (ponto-a-ponto)
    • Modo AP + WDS
    • Modo repetidor
    • Modo Client
  • Dispositivos clientes wireless LAN
  • Instalação e configuração de dispositivos clientes

 

Capítulo 5 – Antenas e Acessórios

  • Princípios de Antenas
  • Componentes de um sistema de comunicação wireless
  • Dipolo de meia onda
  • Linha de visada
  • Zona de Fresnel
  • Raio da Zona de Fresnel em qualquer ponto
  • Análise de obstruções
  • Altura de Antenas: Exemplo de cálculo
  • Ganho da antena
  • Polarização
  • Perda por polarização e isolação por polarização cruzada
  • Azimute
  • Diagrama de visualização
  • Tipos de antenas
    • Antenas Omnidirecionais
    • Antenas Semi-direcionais
    • Antenas direcionais: Parabólicas
  • Largura do feixe (beamwidth)
  • Perda de sinal no espaço livre
  • Outros fatores de perda no espaço livre
  • Acessórios
    • Atenuadores
    • Protetores de descarga elétrica indireta
    • Proteção contra descargas atmosféricas diretas
  • Malha de aterramento para torres
  • Pára-raios e aterramento de torres
  • Cabos
    • Tipos de cabos
    • Calcule seu cabo
    • Acessórios – Conectores de RF
    • Montagem Conector NF para cabo RG 213
    • Montagem Conector NM para cabo RG 213
    • Problemas mais frequentes de montagem de cabo
    • Vedação de conectores RF
  • Acessórios – Pigtail
  • Instalação de antenas
    • Localização
    • Separação física das antenas
    • Montagem
    • Exemplo de fixação de antenas
  • Caixa de proteção
  • Segurança na instalação
  • Alinhamento de Antenas
  • Teste de conexão e desempenho
  • Exemplo de determinação da sensibilidade do receptor

 

Capítulo 6 – Arquitetura IEEE 802.11

  • Dyanamic Rate Shifting ou Automatic Rate Selection
  • Método de Acesso ao Meio CSMA/CA
    • Request to Send / Clear to Send (RTS/CTS)
  • Topologia Wireless LAN
    • Independent Bais Select Set (IBSS) ou ad-hoc
    • Basic Service Set (BSS) ou modo infra-estrutura
    • Extended Service Set (ESS)
    • Protocolo Spanning Tree (STP)
    • Extended Service Set (ESS)
  • Topologia Estrela
  • Topologia Barramento
  • Topologia Anel
  • Topologia Mesh

 

Capítulo 7 – Segurança em Wireless LAN

  • Segurança em Wireless Lan segundo 802.11
  • Serviços básicos de segurança definidos pelo IEEE 802.11
  • Uso do SSID
  • Autenticação por sistema aberto (Open System)
  • Autenticação por compartilhamento de chave (Shared Key)
  • Uso do WEP
  • Chave WEP estática
  • WPA – PSK (Pre-Shared Key)
  • WPA 802.1x
  • RADIUS
  • Vulnerabilidade Interna
  • Vulnerabilidade Externa
  • Ameaças e Ataques externos: Ataques Passivos
  • Ameaças e Ataques externos: Ataques Ativos

 

 

 

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